33 Result(s)
within
Computer Communication Networks
Cryptology
Information Systems Applications (incl. Internet)
Management of Computing and Information Systems
**mo Wang
Chapter
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Chapter and Conference Paper
Generalizing PIR for Practical Private Retrieval of Public Data
Private retrieval of public data is useful when a client wants to query a public data service without revealing the query to the server. Computational Private Information Retrieval (cPIR) achieves complete privac...
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Chapter and Conference Paper
A Role-Involved Conditional Purpose-Based Access Control Model
This paper presents a role-involved conditional purpose-based access control (RCPBAC) model, where a purpose is defined as the intension of data accesses or usages. RCPBAC allows users using some data for cert...
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Chapter and Conference Paper
Distributed and Secure Access Control in P2P Databases
The intent of peer data management systems (PDMS) is to share as much data as possible. However, in many applications leveraging sensitive data, users demand adequate mechanisms to restrict the access to autho...
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Chapter and Conference Paper
The Delicate Issues of Addition with Respect to XOR Differences
In this paper we analyze the previous attacks on the block cipher SHACAL-1 and show that all the differential-based attacks fail due to mistreatment of XOR differences through addition. We show that the previo...
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Chapter and Conference Paper
Preventing Collusion Attacks on the One-Way Function Tree (OFT) Scheme
The one-way function tree (OFT) scheme proposed by Balenson et al. is widely regarded as an efficient key management solution for multicast communication in large dynamic groups. Following Horng’s claim that the ...
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Chapter and Conference Paper
A More Natural Way to Construct Identity-Based Identification Schemes
Constructing identification schemes is one of the fundamental problems in cryptography, and is very useful in practice. An identity-based identification (IBI) scheme allows a prover to identify itself to a pub...
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Chapter and Conference Paper
An Improved Poly1305 MAC
In this paper, we propose an improved Poly1305 MAC, called IPMAC. IPMAC is a refinement of Poly1305 MAC shown by Bernstein. We use only one 16-byte key and one 16-byte nonce for IPMAC while Poly1305 MAC uses t...
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Chapter and Conference Paper
Real Perfect Contrast Visual Secret Sharing Schemes with Reversing
The visual secret sharing (VSS for short) scheme is a secret image sharing scheme. A secret image is visually revealed from overlap** shadow images without additional computations. However, the contrast of r...
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Chapter and Conference Paper
Adaptive Detection of Local Scanners
Network attacks often employ scanning to locate vulnerable hosts and services. Fast and accurate detection of local scanners is key to containing an epidemic in its early stage. Existing scan detection schemes...
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Chapter and Conference Paper
Building Reliable Mix Networks with Fair Exchange
In this paper we present techniques by which each mix in a mix network can be paid for its services by message senders, in a way that ensures fairness and without sacrificing anonymity. We describe a payment m...
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Chapter and Conference Paper
Strengthening Password-Based Authentication Protocols Against Online Dictionary Attacks
Passwords are one of the most common cause of system break-ins, because the low entropy of passwords makes systems vulnerable to brute force guessing attacks (dictionary attacks). Existing Strong Password-base...
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Chapter and Conference Paper
Weaknesses of a Password-Authenticated Key Exchange Protocol between Clients with Different Passwords
A password-authenticated key exchange scheme allows two entities, who only share a memorable password, to authenticate each other and to agree on a cryptographic session key. Instead of considering it in the c...
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Chapter and Conference Paper
Multiple-Time Signature Schemes against Adaptive Chosen Message Attacks
Multiple-time signatures are digital signature schemes where the signer is able to sign a predetermined number of messages. They are interesting cryptographic primitives because they allow to solve many import...
